University of Washington

Jasmine Graham

Eric J Seibel

Leonard Y Nelson

Manuja Sharma

Systems and methods for accurate optical pH sensing of biofilms are disclosed. In one embodiment, a method of measuring an extracellular pH level using multiple wavelengths emitted by a fluorescent substance includes: exciting the fluorescent substance at an excitation wavelength; measuring a first fluorescence intensity at a first wavelength of a fluorescence emission; and measuring a second fluorescence intensity at a second wavelength of the fluorescence emission. The second wavelength is different from the first wavelength. The method also includes determining the extracellular pH level based on the first fluorescence intensity at the first wavelength and the second fluorescence intensity at the second wavelength.

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Seattle, WA, United States of America

Jasmine Graham